HPLC instrumentation and working conditions. Phenolic compound analysis was conducted with Shimadzu HPLC system The HPLC system consisted of a binary pumping system: pump A (LC-10AD vp) and pump B (LC-10AD), a degasser (DGU-14A), an auto-injector (SIL-10AD vp), column oven (CTO-10A vp) and UV/Vis diode array detector (SPD-M10Avp) and system controller (SCL-10A vp)